source: trunk/minix/commands/ibm/loadkeys.c@ 21

Last change on this file since 21 was 9, checked in by Mattia Monga, 13 years ago

Minix 3.1.2a

File size: 1.5 KB
Line 
1/* loadkeys - load national keyboard map Author: Marcus Hampel
2 */
3#include <sys/types.h>
4#include <sys/ioctl.h>
5#include <minix/keymap.h>
6#include <fcntl.h>
7#include <unistd.h>
8#include <stdlib.h>
9#include <string.h>
10#include <errno.h>
11
12#if __minix_vmd
13#define KBD_DEVICE "/dev/kbd"
14#else
15#define KBD_DEVICE "/dev/console"
16#endif
17
18u16_t keymap[NR_SCAN_CODES * MAP_COLS];
19u8_t comprmap[4 + NR_SCAN_CODES * MAP_COLS * 9/8 * 2 + 1];
20
21
22void tell(char *s)
23{
24 write(2, s, strlen(s));
25}
26
27
28void fatal(char *say)
29{
30 int err = errno;
31 tell("loadkeys: ");
32 if (say != NULL) {
33 tell(say);
34 tell(": ");
35 }
36 tell(strerror(err));
37 tell("\n");
38 exit(1);
39}
40
41
42void usage(void)
43{
44 tell("Usage: loadkeys mapfile\n");
45 exit(1);
46}
47
48
49int main(int argc, char *argv[])
50{
51 u8_t *cm;
52 u16_t *km;
53 int fd, n, fb;
54
55 if (argc != 2)
56 usage();
57
58 if ((fd = open(argv[1], O_RDONLY)) < 0) fatal(argv[1]);
59
60 if (read(fd, comprmap, sizeof(comprmap)) < 0) fatal(argv[1]);
61
62 if (memcmp(comprmap, KEY_MAGIC, 4) != 0) {
63 tell("loadkeys: ");
64 tell(argv[1]);
65 tell(": not a keymap file\n");
66 exit(1);
67 }
68 close(fd);
69
70 /* Decompress the keymap data. */
71 cm = comprmap + 4;
72 n = 8;
73 for (km = keymap; km < keymap + NR_SCAN_CODES * MAP_COLS; km++) {
74 if (n == 8) {
75 /* Need a new flag byte. */
76 fb = *cm++;
77 n = 0;
78 }
79 *km = *cm++; /* Low byte. */
80 if (fb & (1 << n)) {
81 *km |= (*cm++ << 8); /* One of the few special keys. */
82 }
83 n++;
84 }
85
86 if ((fd = open(KBD_DEVICE, O_WRONLY)) < 0) fatal(KBD_DEVICE);
87
88 if (ioctl(fd, KIOCSMAP, keymap) < 0) fatal(KBD_DEVICE);
89
90 return 0;
91}
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